Schneier’s talk is broader than Stone’s focus (see link to entire talk below) but Stone gets it right in this conclusion:

Mr. Schneier’s message: It’s foolish to ask us to be rational about risks. And sometimes “security theater” – like the stuff we see at the airport – can actually have a purpose when there’s a need to reassure people that they really are safe. But such displays can still be harmful when there are no solid security measures to back them up.